Adorable and practical, the Koala Diffuser is a fun addition to any room. This diffuser features two ambient light options, four musical settings, and five volume levels. Whether you want a soothing piano lullaby at night or a cheerful birdsong in the morning, you can choose sounds to match any situation! This cheerful Koala Diffuser can fill a room up to 270 square feet for four hours when operating continuously or eight hours intermittently.